Surface pattern for tire sidewall



FIG. 1 is a side view of a surface pattern for a tire sidewall showing my new design; and,

FIG. 2 is a greatly enlarged side view of a portion of the tire sidewall shown in FIG. 1.

The broken lines shown in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a surface pattern for a tire sidewall, as shown and described. 